Psychrometers measure humidity by calculating dry bulb and wet bulb temperatures and applying the psychrometric equation. Because of its high measurement accuracy, it is also utilized as a standard instrument. Aspiration Psychrometer Model Assmann THIES Clima serves for measuring the air temperature and the humidity.
Aspiration Psychrometer Model Assmann Function
Two thermometers with colored petroleum are mounted in parallel. One thermometer has a wet bulb covered by a moistened wick for measurement. The second thermometer's bulb lacks a wick and is enclosed by two radiation tubes alongside the first thermometer. The instrument's surface is polished to provide an efficient radiation shield. The amount of water vapor present in the air affects the evaporation of water from the wet bulb thermometer's wick, resulting in the column of the thermometer dropping due to evaporative cooling. The dry bulb thermometer accurately measures the air temperature. The difference between the temperature readings of the two thermometers is known as the psychrometric depression. Using this information, the relative humidity, dew point temperature, and vapor pressure of the air can be calculated or looked up in tables. To ensure accurate readings, both thermometer bulbs are ventilated with a fan at an average speed of 3 m/s.
Specification
Order No: 1.0400.00.010
Thermometer Type: Assmann-Psychometer-Thermometer
Measurement methods: Mercury thermometer
Measurement Accuracy: ± 0.2 K
Measuring range [° C]: -10 ... +60
Graduation: 0.2 ° C
Aspirator: spring-wound drive
Measuring time: approx. 8 min (4 ... 2 m/s)
Dimension: 90 x 420 mm
Weight (Kg): 3.5Kg
Main features of Aspiration Psychrometer Assmann
- Good value for money
- high accuracy
- usable as normal humidity
- Standard thermometers, DIN measuring range
- high reliability
- easy handling
Accessories
Replacement Thermometer
Order No.: 502588
for Aspiration-Psychrometer 1.0400.00.010
Wick 3.5 mm
Order No.: 502578
Serves as replacement for used / soiled wicks at humidity thermometers of psychrometers, or as adding, for upgrading replacement thermometers to humidity thermometers.
Diameter / Length 3.5 mm / 1 m